气候变化领域集成服务门户(CCPortal): Embodied emissions of buildings - A forgotten factor in green building certificates

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DOI	10.1016/j.enbuild.2021.110962
	Embodied emissions of buildings - A forgotten factor in green building certificates
	Amiri A.; Emami N.; Ottelin J.; Sorvari J.; Marteinsson B.; Heinonen J.; Junnila S.
发表日期	2021
ISSN	3787788
卷号	241
英文摘要	The construction and use of buildings consume a significant proportion of global energy and natural resources. Leadership in Energy and Environmental Design (LEED) is arguably the most international green building certification system and attempts to take actions to limit energy use of buildings and construct them sustainably. While there has been a wide range of research mainly focused on energy use and emission production during the operation phase of LEED-certified buildings, research on embodied emissions is rare. The aim of this study is to evaluate the efficiency of LEED regarding initial (pre-use) embodied emissions using life cycle assessment (LCA). The study comprised several steps using a designed model. In the first step, three optional building material scenarios were defined (optimized concrete, hybrid concrete-wood, and wooden buildings) in addition to the base case concrete building located in Iceland. Second, an LCA was conducted for each scenario. Finally, the number of LEED points and the level of LEED certification was assessed for all studied scenarios. In addition, a comparison regarding embodied emissions consideration between LEED and Building Research Establishment Environmental Assessment Method (BREEAM) as mostly used green certificate was conducted in the discussion section. The LCA showed the lowest environmental impact for the wooden building followed by the hybrid concrete-wood building. In the LEED framework, wooden and hybrid scenarios obtained 14 and 8 points that were related to material selection. Among these points, only 3 (out of a total of 110 available points) were directly accredited to embodied emissions. The study recommends that the green building certificates increase the weight of sustainable construction materials since the significance of embodied emissions is substantially growing along with the current carbon neutrality goals. As most of the materials for building construction are imported into Iceland, this study is useful for locations similar to Iceland, while overall it is beneficial for the whole world regarding climate change mitigation. © 2021 The Author(s)
英文关键词	LCA, Life cycle assessment; LEED, Leadership in energy and environmental design
scopus关键词	Architectural design; Climate change; Concretes; Ecodesign; Environmental design; Environmental impact; Sustainable development; Building certificates; Certification systems; Embodied emissions; Energy use; Global energy; Green buildings; Icelands; Leadership in energy and environmental design, leadership in energy and environmental design; Leadership in energy and environmental designs; Life cycle assessment, life cycle assessment; Life cycle
来源期刊	Energy and Buildings
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/177056
作者单位	Department of Built Environment/School of Engineering, Aalto University, Espoo, 00076, Finland; School of Engineering and Natural Sciences/Faculty of Civil and Environmental Engineering, University of Iceland, Reykjavik, 101, Iceland; Finnish Environment Institute, Latokartanonkaari 11, Helsinki, 00790, Finland
推荐引用方式 GB/T 7714	Amiri A.,Emami N.,Ottelin J.,et al. Embodied emissions of buildings - A forgotten factor in green building certificates[J],2021,241.
APA	Amiri A..,Emami N..,Ottelin J..,Sorvari J..,Marteinsson B..,...&Junnila S..(2021).Embodied emissions of buildings - A forgotten factor in green building certificates.Energy and Buildings,241.
MLA	Amiri A.,et al."Embodied emissions of buildings - A forgotten factor in green building certificates".Energy and Buildings 241(2021).